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Income Taxes (Expiry Schedule of Net Operating Loss Carryforwards) (Detail) ¥ in Millions	Mar. 31, 2023 JPY (¥)
Income Tax Disclosure [Abstract]
2024	¥ 17,360
2025	21,183
2026	24,810
2027	13,686
2028	7,993
Thereafter	279,892
Indefinite period	92,061
Total	¥ 456,985

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- Definition

Net operating loss carry forwards expiring in reminder of fiscal year.

+ References

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- Definition

Net Operating Loss Carryforwards Expiring In Year Four

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- Definition

Amount of operating loss carryforward, before tax effects, available to reduce future taxable income under enacted tax laws.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 740
-SubTopic 10
-Section 50
-Paragraph 3
-Subparagraph (a)
-URI https://asc.fasb.org/extlink&oid=121826272&loc=d3e32559-109319

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